Premium
Transport in oriented bottles made from polyester resin
Author(s) -
Swaroop Naresh,
Gordon Gerald A.
Publication year - 1980
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760200113
Subject(s) - polyester , materials science , oxygen transport , intrinsic viscosity , permeation , polymer , degradation (telecommunications) , oxygen , chemical engineering , polymer chemistry , oxygen permeability , composite material , water transport , permeability (electromagnetism) , organic chemistry , chemistry , membrane , water flow , engineering , telecommunications , biochemistry , computer science , environmental engineering
Oxygen permeation has been measured in flat sheet as a function of degree of orientation, and oxygen and water transport have been measured in oriented polyester bottles. O 2 permeability in flat sheets decreases gradually with orientation on either side of an abrupt decrease by about a factor of 2 after moderate orientation. The bottles tested were all more highly oriented than that critical decree; no significant effect of orientation on water or O 2 transport in bottles could be found. Only container intrinsic viscosity (IV) (which is determined by molecular weight, and is therefore a convenient measure of polymer degradation) was significantly related to the transport properties of the bottles. It was found that O 2 transport is increased with increasing IV while H 2 O transport decreased. The explanation for these seemingly contradictory data can be found in the chemistry of degradation of the polyester.